diff --git a/src/SOL005/NSDManagement/definitions/SOL005NSDescriptorManagement_def.yaml b/src/SOL005/NSDManagement/definitions/SOL005NSDescriptorManagement_def.yaml
index 336caacd80e9274ac04fd8103cfebf82597faaea..8525062dd58ea2e3602b830a7c35d73e3128ddc5 100644
--- a/src/SOL005/NSDManagement/definitions/SOL005NSDescriptorManagement_def.yaml
+++ b/src/SOL005/NSDManagement/definitions/SOL005NSDescriptorManagement_def.yaml
@@ -98,7 +98,7 @@ definitions:
       onboardingFailureDetails:
         description: >
           Failure details of current on boarding procedure. See
-          clause 4.3.5.3 for the details of "ProblemDetails"
+          clause 6.3 of ETSI GS NFV-SOL 013 for the details of "ProblemDetails"
           structure.
           It shall be present when the "nsdOnboardingState"
           attribute is CREATED and the uploading or
@@ -207,6 +207,7 @@ definitions:
       onboardingFailureDetails:
         description: >
           Failure details of current on-boarding procedure.
+          See clause 6.3 of ETSI GS NFV-SOL 013 for the details of "ProblemDetails" structure.
           It shall be present when the
           pnfdOnboardingState attribute is CREATED
           and the uploading or processing fails in the NFVO.
@@ -257,6 +258,10 @@ definitions:
         description: >
           The URI of the endpoint to send the notification to.
       authentication:
+        description: >
+          Authentication parameters to configure the use of Authorization when sending
+          notifications corresponding to this subscription, as defined in clause 8.3.4 of ETSI GS NFV-SOL 013.
+          This attribute shall only be present if the subscriber requires authorization of notifications.
         $ref: "../../definitions/SOL005_def.yaml#/definitions/SubscriptionAuthentication"
     description: >
       This type represents a subscription request related to notifications
diff --git a/src/SOL005/NSDManagementNotification/definitions/SOL005NSDescriptorManagementNotification_def.yaml b/src/SOL005/NSDManagementNotification/definitions/SOL005NSDescriptorManagementNotification_def.yaml
index 5b4568c3a9d68f78d29409a672f38635dddcf5b8..b3f02986218dbb0588e6ce86a15fb2f8fd5b37e2 100644
--- a/src/SOL005/NSDManagementNotification/definitions/SOL005NSDescriptorManagementNotification_def.yaml
+++ b/src/SOL005/NSDManagementNotification/definitions/SOL005NSDescriptorManagementNotification_def.yaml
@@ -67,6 +67,9 @@ definitions:
       nsdId:
         $ref: "../../definitions/SOL005_def.yaml#/definitions/Identifier"
       onboardingFailureDetails:
+        description: >
+          Failure details of current onboarding procedure. See clause 6.3 of ETSI GS NFV-SOL 013
+          for the details of "ProblemDetails" structure.
         $ref: "../../definitions/SOL005_def.yaml#/definitions/ProblemDetails"
       _links:
         $ref: "#/definitions/NsdmLinks"
@@ -222,6 +225,9 @@ definitions:
       pnfdId:
         $ref: "../../definitions/SOL005_def.yaml#/definitions/Identifier"
       onboardingFailureDetails:
+        description: >
+          Failure details of current onboarding procedure. See clause 6.3 of ETSI GS NFV-SOL 013
+          for the details of "ProblemDetails" structure.
         $ref: "../../definitions/SOL005_def.yaml#/definitions/ProblemDetails"
       _links:
         $ref: "#/definitions/PnfdmLinks"